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Mirrors > Home > MPE Home > Th. List > gictr | Structured version Visualization version GIF version |
Description: Isomorphism is transitive. (Contributed by Mario Carneiro, 21-Apr-2016.) |
Ref | Expression |
---|---|
gictr | ⊢ ((𝑅 ≃𝑔 𝑆 ∧ 𝑆 ≃𝑔 𝑇) → 𝑅 ≃𝑔 𝑇) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | brgic 18673 | . 2 ⊢ (𝑅 ≃𝑔 𝑆 ↔ (𝑅 GrpIso 𝑆) ≠ ∅) | |
2 | brgic 18673 | . 2 ⊢ (𝑆 ≃𝑔 𝑇 ↔ (𝑆 GrpIso 𝑇) ≠ ∅) | |
3 | n0 4261 | . . 3 ⊢ ((𝑅 GrpIso 𝑆) ≠ ∅ ↔ ∃𝑓 𝑓 ∈ (𝑅 GrpIso 𝑆)) | |
4 | n0 4261 | . . 3 ⊢ ((𝑆 GrpIso 𝑇) ≠ ∅ ↔ ∃𝑔 𝑔 ∈ (𝑆 GrpIso 𝑇)) | |
5 | exdistrv 1964 | . . . 4 ⊢ (∃𝑓∃𝑔(𝑓 ∈ (𝑅 GrpIso 𝑆) ∧ 𝑔 ∈ (𝑆 GrpIso 𝑇)) ↔ (∃𝑓 𝑓 ∈ (𝑅 GrpIso 𝑆) ∧ ∃𝑔 𝑔 ∈ (𝑆 GrpIso 𝑇))) | |
6 | gimco 18672 | . . . . . . 7 ⊢ ((𝑔 ∈ (𝑆 GrpIso 𝑇) ∧ 𝑓 ∈ (𝑅 GrpIso 𝑆)) → (𝑔 ∘ 𝑓) ∈ (𝑅 GrpIso 𝑇)) | |
7 | brgici 18674 | . . . . . . 7 ⊢ ((𝑔 ∘ 𝑓) ∈ (𝑅 GrpIso 𝑇) → 𝑅 ≃𝑔 𝑇) | |
8 | 6, 7 | syl 17 | . . . . . 6 ⊢ ((𝑔 ∈ (𝑆 GrpIso 𝑇) ∧ 𝑓 ∈ (𝑅 GrpIso 𝑆)) → 𝑅 ≃𝑔 𝑇) |
9 | 8 | ancoms 462 | . . . . 5 ⊢ ((𝑓 ∈ (𝑅 GrpIso 𝑆) ∧ 𝑔 ∈ (𝑆 GrpIso 𝑇)) → 𝑅 ≃𝑔 𝑇) |
10 | 9 | exlimivv 1940 | . . . 4 ⊢ (∃𝑓∃𝑔(𝑓 ∈ (𝑅 GrpIso 𝑆) ∧ 𝑔 ∈ (𝑆 GrpIso 𝑇)) → 𝑅 ≃𝑔 𝑇) |
11 | 5, 10 | sylbir 238 | . . 3 ⊢ ((∃𝑓 𝑓 ∈ (𝑅 GrpIso 𝑆) ∧ ∃𝑔 𝑔 ∈ (𝑆 GrpIso 𝑇)) → 𝑅 ≃𝑔 𝑇) |
12 | 3, 4, 11 | syl2anb 601 | . 2 ⊢ (((𝑅 GrpIso 𝑆) ≠ ∅ ∧ (𝑆 GrpIso 𝑇) ≠ ∅) → 𝑅 ≃𝑔 𝑇) |
13 | 1, 2, 12 | syl2anb 601 | 1 ⊢ ((𝑅 ≃𝑔 𝑆 ∧ 𝑆 ≃𝑔 𝑇) → 𝑅 ≃𝑔 𝑇) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∃wex 1787 ∈ wcel 2110 ≠ wne 2940 ∅c0 4237 class class class wbr 5053 ∘ ccom 5555 (class class class)co 7213 GrpIso cgim 18661 ≃𝑔 cgic 18662 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-op 4548 df-uni 4820 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-id 5455 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-1st 7761 df-2nd 7762 df-1o 8202 df-map 8510 df-0g 16946 df-mgm 18114 df-sgrp 18163 df-mnd 18174 df-mhm 18218 df-grp 18368 df-ghm 18620 df-gim 18663 df-gic 18664 |
This theorem is referenced by: gicer 18680 cyggic 20537 |
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